citrus_viqr.c revision 1.3.18.1
1 /* $NetBSD: citrus_viqr.c,v 1.3.18.1 2008/06/23 04:29:31 wrstuden Exp $ */ 2 3 /*- 4 * Copyright (c)2006 Citrus Project, 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 */ 29 30 #include <sys/cdefs.h> 31 #if defined(LIBC_SCCS) && !defined(lint) 32 __RCSID("$NetBSD: citrus_viqr.c,v 1.3.18.1 2008/06/23 04:29:31 wrstuden Exp $"); 33 #endif /* LIBC_SCCS and not lint */ 34 35 #include <sys/queue.h> 36 #include <sys/types.h> 37 #include <assert.h> 38 #include <errno.h> 39 #include <string.h> 40 #include <stdint.h> 41 #include <stdlib.h> 42 #include <stddef.h> 43 #include <wchar.h> 44 #include <limits.h> 45 46 #include "citrus_namespace.h" 47 #include "citrus_types.h" 48 #include "citrus_bcs.h" 49 #include "citrus_module.h" 50 #include "citrus_ctype.h" 51 #include "citrus_stdenc.h" 52 #include "citrus_viqr.h" 53 54 #define ESCAPE '\\' 55 56 /* 57 * this table generated from RFC 1456. 58 */ 59 static const char *mnemonic_rfc1456[0x100] = { 60 NULL , NULL , "A(?", NULL , NULL , "A(~", "A^~", NULL , 61 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 62 NULL , NULL , NULL , NULL , "Y?" , NULL , NULL , NULL , 63 NULL , "Y~" , NULL , NULL , NULL , NULL , "Y." , NULL , 64 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 65 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 66 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 67 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 68 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 69 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 70 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 71 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 72 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 73 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 74 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 75 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 76 "A." , "A('", "A(`", "A(.", "A^'", "A^`", "A^?", "A^.", 77 "E~" , "E." , "E^'", "E^`", "E^?", "E^~", "E^.", "O^'", 78 "O^`", "O^?", "O^~", "O^.", "O+.", "O+'", "O+`", "O+?", 79 "I." , "O?" , "O." , "I?" , "U?" , "U~" , "U." , "Y`" , 80 "O~" , "a('", "a(`", "a(.", "a^'", "a^`", "a^?", "a^.", 81 "e~" , "e." , "e^'", "e^`", "e^?", "e^~", "e^.", "o^'", 82 "o^`", "o^?", "o^~", "O+~", "O+" , "o^.", "o+`", "o+?", 83 "i." , "U+.", "U+'", "U+`", "U+?", "o+" , "o+'", "U+" , 84 "A`" , "A'" , "A^" , "A~" , "A?" , "A(" , "a(?", "a(~", 85 "E`" , "E'" , "E^" , "E?" , "I`" , "I'" , "I~" , "y`" , 86 "DD" , "u+'", "O`" , "O'" , "O^" , "a." , "y?" , "u+`", 87 "u+?", "U`" , "U'" , "y~" , "y." , "Y'" , "o+~", "u+" , 88 "a`" , "a'" , "a^" , "a~" , "a?" , "a(" , "u+~", "a^~", 89 "e`" , "e'" , "e^" , "e?" , "i`" , "i'" , "i~" , "i?" , 90 "dd" , "u+.", "o`" , "o'" , "o^" , "o~" , "o?" , "o." , 91 "u." , "u`" , "u'" , "u~" , "u?" , "y'" , "o+.", "U+~", 92 }; 93 94 typedef struct { 95 const char *name; 96 wchar_t value; 97 } mnemonic_def_t; 98 99 static const mnemonic_def_t mnemonic_ext[] = { 100 /* add extra mnemonic here (should be sorted by wchar_t order). */ 101 }; 102 static const size_t mnemonic_ext_size = 103 sizeof(mnemonic_ext) / sizeof(mnemonic_def_t); 104 105 static const char * 106 mnemonic_ext_find(wchar_t wc, const mnemonic_def_t *head, size_t n) 107 { 108 const mnemonic_def_t *mid; 109 110 _DIAGASSERT(head != NULL); 111 112 for (; n > 0; n >>= 1) { 113 mid = head + (n >> 1); 114 if (mid->value == wc) { 115 return mid->name; 116 } else if (mid->value < wc) { 117 head = mid + 1; 118 --n; 119 } 120 } 121 return NULL; 122 } 123 124 struct mnemonic_t; 125 typedef TAILQ_HEAD(mnemonic_list_t, mnemonic_t) mnemonic_list_t; 126 typedef struct mnemonic_t { 127 TAILQ_ENTRY(mnemonic_t) entry; 128 int ascii; 129 struct mnemonic_t *parent; 130 mnemonic_list_t child; 131 wchar_t value; 132 } mnemonic_t; 133 134 static mnemonic_t * 135 mnemonic_list_find(mnemonic_list_t *ml, int ch) 136 { 137 mnemonic_t *m; 138 139 _DIAGASSERT(ml != NULL); 140 141 TAILQ_FOREACH(m, ml, entry) { 142 if (m->ascii == ch) 143 return m; 144 } 145 146 return NULL; 147 } 148 149 static mnemonic_t * 150 mnemonic_create(mnemonic_t *parent, int ascii, wchar_t value) 151 { 152 mnemonic_t *m; 153 154 _DIAGASSERT(parent != NULL); 155 156 m = malloc(sizeof(*m)); 157 if (m != NULL) { 158 m->parent = parent; 159 m->ascii = ascii; 160 m->value = value; 161 TAILQ_INIT(&m->child); 162 } 163 164 return m; 165 } 166 167 static int 168 mnemonic_append_child(mnemonic_t *m, const char *s, 169 wchar_t value, wchar_t invalid) 170 { 171 int ch; 172 mnemonic_t *m0; 173 174 _DIAGASSERT(m != NULL); 175 _DIAGASSERT(s != NULL); 176 177 ch = (unsigned char)*s++; 178 if (ch == '\0') 179 return EINVAL; 180 m0 = mnemonic_list_find(&m->child, ch); 181 if (m0 == NULL) { 182 m0 = mnemonic_create(m, ch, (wchar_t)ch); 183 if (m0 == NULL) 184 return ENOMEM; 185 TAILQ_INSERT_TAIL(&m->child, m0, entry); 186 } 187 m = m0; 188 for (m0 = NULL; (ch = (unsigned char)*s) != '\0'; ++s) { 189 m0 = mnemonic_list_find(&m->child, ch); 190 if (m0 == NULL) { 191 m0 = mnemonic_create(m, ch, invalid); 192 if (m0 == NULL) 193 return ENOMEM; 194 TAILQ_INSERT_TAIL(&m->child, m0, entry); 195 } 196 m = m0; 197 } 198 if (m0 == NULL) 199 return EINVAL; 200 m0->value = value; 201 202 return 0; 203 } 204 205 static void 206 mnemonic_destroy(mnemonic_t *m) 207 { 208 mnemonic_t *m0; 209 210 _DIAGASSERT(m != NULL); 211 212 TAILQ_FOREACH(m0, &m->child, entry) 213 mnemonic_destroy(m0); 214 free(m); 215 } 216 217 typedef struct { 218 size_t mb_cur_max; 219 wchar_t invalid; 220 mnemonic_t *mroot; 221 } _VIQREncodingInfo; 222 223 typedef struct { 224 int chlen; 225 char ch[MB_LEN_MAX]; 226 } _VIQRState; 227 228 typedef struct { 229 _VIQREncodingInfo ei; 230 struct { 231 /* for future multi-locale facility */ 232 _VIQRState s_mblen; 233 _VIQRState s_mbrlen; 234 _VIQRState s_mbrtowc; 235 _VIQRState s_mbtowc; 236 _VIQRState s_mbsrtowcs; 237 _VIQRState s_wcrtomb; 238 _VIQRState s_wcsrtombs; 239 _VIQRState s_wctomb; 240 } states; 241 } _VIQRCTypeInfo; 242 243 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei) 244 #define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_ 245 246 #define _FUNCNAME(m) _citrus_VIQR_##m 247 #define _ENCODING_INFO _VIQREncodingInfo 248 #define _CTYPE_INFO _VIQRCTypeInfo 249 #define _ENCODING_STATE _VIQRState 250 #define _ENCODING_MB_CUR_MAX(_ei_) (_ei_)->mb_cur_max 251 #define _ENCODING_IS_STATE_DEPENDENT 1 252 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 253 254 static __inline void 255 /*ARGSUSED*/ 256 _citrus_VIQR_init_state(_VIQREncodingInfo * __restrict ei, 257 _VIQRState * __restrict psenc) 258 { 259 /* ei may be unused */ 260 _DIAGASSERT(psenc != NULL); 261 262 psenc->chlen = 0; 263 } 264 265 static __inline void 266 /*ARGSUSED*/ 267 _citrus_VIQR_pack_state(_VIQREncodingInfo * __restrict ei, 268 void *__restrict pspriv, const _VIQRState * __restrict psenc) 269 { 270 /* ei may be unused */ 271 _DIAGASSERT(pspriv != NULL); 272 _DIAGASSERT(psenc != NULL); 273 274 memcpy(pspriv, (const void *)psenc, sizeof(*psenc)); 275 } 276 277 static __inline void 278 /*ARGSUSED*/ 279 _citrus_VIQR_unpack_state(_VIQREncodingInfo * __restrict ei, 280 _VIQRState * __restrict psenc, const void * __restrict pspriv) 281 { 282 /* ei may be unused */ 283 _DIAGASSERT(psenc != NULL); 284 _DIAGASSERT(pspriv != NULL); 285 286 memcpy((void *)psenc, pspriv, sizeof(*psenc)); 287 } 288 289 static int 290 _citrus_VIQR_mbrtowc_priv(_VIQREncodingInfo * __restrict ei, 291 wchar_t * __restrict pwc, const char ** __restrict s, size_t n, 292 _VIQRState * __restrict psenc, size_t * __restrict nresult) 293 { 294 const char *s0; 295 wchar_t wc; 296 mnemonic_t *m, *m0; 297 size_t i; 298 int ch, escape; 299 300 _DIAGASSERT(ei != NULL); 301 /* pwc may be null */ 302 _DIAGASSERT(s != NULL); 303 _DIAGASSERT(psenc != NULL); 304 _DIAGASSERT(nresult != NULL); 305 306 if (*s == NULL) { 307 _citrus_VIQR_init_state(ei, psenc); 308 *nresult = (size_t)_ENCODING_IS_STATE_DEPENDENT; 309 return 0; 310 } 311 s0 = *s; 312 313 i = 0; 314 m = ei->mroot; 315 for (escape = 0;;) { 316 if (psenc->chlen == i) { 317 if (n-- < 1) { 318 *s = s0; 319 *nresult = (size_t)-2; 320 return 0; 321 } 322 psenc->ch[psenc->chlen++] = *s0++; 323 } 324 ch = (unsigned char)psenc->ch[i++]; 325 if (ch == ESCAPE) { 326 if (m != ei->mroot) 327 break; 328 escape = 1; 329 continue; 330 } 331 if (escape != 0) 332 break; 333 m0 = mnemonic_list_find(&m->child, ch); 334 if (m0 == NULL) 335 break; 336 m = m0; 337 } 338 while (m != ei->mroot) { 339 --i; 340 if (m->value != ei->invalid) 341 break; 342 m = m->parent; 343 } 344 if (ch == ESCAPE && m != ei->mroot) 345 ++i; 346 psenc->chlen -= i; 347 memmove(&psenc->ch[0], &psenc->ch[i], psenc->chlen); 348 wc = (m == ei->mroot) ? (wchar_t)ch : m->value; 349 if (pwc != NULL) 350 *pwc = wc; 351 *nresult = (size_t)(wc == 0 ? 0 : s0 - *s); 352 *s = s0; 353 354 return 0; 355 } 356 357 static int 358 _citrus_VIQR_wcrtomb_priv(_VIQREncodingInfo * __restrict ei, 359 char * __restrict s, size_t n, wchar_t wc, 360 _VIQRState * __restrict psenc, size_t * __restrict nresult) 361 { 362 mnemonic_t *m; 363 int ch, escape; 364 const char *p; 365 366 _DIAGASSERT(ei != NULL); 367 _DIAGASSERT(s != NULL); 368 _DIAGASSERT(psenc != NULL); 369 _DIAGASSERT(nresult != NULL); 370 371 switch (psenc->chlen) { 372 case 0: case 1: 373 break; 374 default: 375 return EINVAL; 376 } 377 m = NULL; 378 if ((uint32_t)wc <= 0xFF) { 379 p = mnemonic_rfc1456[wc & 0xFF]; 380 if (p != NULL) 381 goto mnemonic_found; 382 if (n-- < 1) 383 goto e2big; 384 ch = (unsigned int)wc; 385 m = ei->mroot; 386 if (psenc->chlen > 0) { 387 m = mnemonic_list_find(&m->child, psenc->ch[0]); 388 if (m == NULL) 389 return EINVAL; 390 psenc->ch[0] = ESCAPE; 391 } 392 if (mnemonic_list_find(&m->child, ch) == NULL) { 393 psenc->chlen = 0; 394 m = NULL; 395 } 396 psenc->ch[psenc->chlen++] = ch; 397 } else { 398 p = mnemonic_ext_find(wc, &mnemonic_ext[0], mnemonic_ext_size); 399 if (p == NULL) { 400 *nresult = (size_t)-1; 401 return EILSEQ; 402 } else { 403 mnemonic_found: 404 psenc->chlen = 0; 405 while (*p != '\0') { 406 if (n-- < 1) 407 goto e2big; 408 psenc->ch[psenc->chlen++] = *p++; 409 } 410 } 411 } 412 memcpy(s, psenc->ch, psenc->chlen); 413 *nresult = psenc->chlen; 414 if (m == ei->mroot) { 415 psenc->ch[0] = ch; 416 psenc->chlen = 1; 417 } else { 418 psenc->chlen = 0; 419 } 420 421 return 0; 422 423 e2big: 424 *nresult = (size_t)-1; 425 return E2BIG; 426 } 427 428 static int 429 /* ARGSUSED */ 430 _citrus_VIQR_put_state_reset(_VIQREncodingInfo * __restrict ei, 431 char * __restrict s, size_t n, _VIQRState * __restrict psenc, 432 size_t * __restrict nresult) 433 { 434 /* ei may be unused */ 435 _DIAGASSERT(s != NULL); 436 _DIAGASSERT(psenc != NULL); 437 _DIAGASSERT(nresult != NULL); 438 439 switch (psenc->chlen) { 440 case 0: case 1: 441 break; 442 default: 443 return EINVAL; 444 } 445 *nresult = 0; 446 psenc->chlen = 0; 447 448 return 0; 449 } 450 451 static __inline int 452 /*ARGSUSED*/ 453 _citrus_VIQR_stdenc_wctocs(_VIQREncodingInfo * __restrict ei, 454 _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc) 455 { 456 /* ei may be unused */ 457 _DIAGASSERT(csid != NULL); 458 _DIAGASSERT(idx != NULL); 459 460 *csid = 0; 461 *idx = (_index_t)wc; 462 463 return 0; 464 } 465 466 static __inline int 467 /*ARGSUSED*/ 468 _citrus_VIQR_stdenc_cstowc(_VIQREncodingInfo * __restrict ei, 469 wchar_t * __restrict pwc, _csid_t csid, _index_t idx) 470 { 471 /* ei may be unused */ 472 _DIAGASSERT(pwc != NULL); 473 474 if (csid != 0) 475 return EILSEQ; 476 *pwc = (wchar_t)idx; 477 478 return 0; 479 } 480 481 static void 482 _citrus_VIQR_encoding_module_uninit(_VIQREncodingInfo *ei) 483 { 484 _DIAGASSERT(ei != NULL); 485 486 mnemonic_destroy(ei->mroot); 487 } 488 489 static int 490 /*ARGSUSED*/ 491 _citrus_VIQR_encoding_module_init(_VIQREncodingInfo * __restrict ei, 492 const void * __restrict var, size_t lenvar) 493 { 494 int errnum; 495 const char *s; 496 size_t i, n; 497 const mnemonic_def_t *p; 498 499 _DIAGASSERT(ei != NULL); 500 /* var may be unused */ 501 502 ei->mb_cur_max = 1; 503 ei->invalid = (wchar_t)-1; 504 ei->mroot = mnemonic_create(NULL, '\0', ei->invalid); 505 if (ei->mroot == NULL) 506 return ENOMEM; 507 for (i = 0; i < sizeof(mnemonic_rfc1456) / sizeof(const char *); ++i) { 508 s = mnemonic_rfc1456[i]; 509 if (s == NULL) 510 continue; 511 n = strlen(s); 512 _DIAGASSERT(n <= MB_LEN_MAX); 513 if (ei->mb_cur_max < n) 514 ei->mb_cur_max = n; 515 errnum = mnemonic_append_child(ei->mroot, 516 s, (wchar_t)i, ei->invalid); 517 if (errnum != 0) { 518 _citrus_VIQR_encoding_module_uninit(ei); 519 return errnum; 520 } 521 } 522 for (i = 0; i < mnemonic_ext_size; ++i) { 523 p = &mnemonic_ext[i]; 524 _DIAGASSERT(p != NULL && p->name != NULL); 525 n = strlen(p->name); 526 _DIAGASSERT(n <= MB_LEN_MAX); 527 if (ei->mb_cur_max < n) 528 ei->mb_cur_max = n; 529 errnum = mnemonic_append_child(ei->mroot, 530 p->name, p->value, ei->invalid); 531 if (errnum != 0) { 532 _citrus_VIQR_encoding_module_uninit(ei); 533 return errnum; 534 } 535 } 536 537 return 0; 538 } 539 540 static __inline int 541 /*ARGSUSED*/ 542 _citrus_VIQR_stdenc_get_state_desc_generic(_VIQREncodingInfo * __restrict ei, 543 _VIQRState * __restrict psenc, int * __restrict rstate) 544 { 545 /* ei may be unused */ 546 _DIAGASSERT(psenc != NULL); 547 _DIAGASSERT(rstate != NULL); 548 549 *rstate = (psenc->chlen == 0) 550 ? _STDENC_SDGEN_INITIAL 551 : _STDENC_SDGEN_INCOMPLETE_CHAR; 552 553 return 0; 554 } 555 556 /* ---------------------------------------------------------------------- 557 * public interface for ctype 558 */ 559 560 _CITRUS_CTYPE_DECLS(VIQR); 561 _CITRUS_CTYPE_DEF_OPS(VIQR); 562 563 #include "citrus_ctype_template.h" 564 565 /* ---------------------------------------------------------------------- 566 * public interface for stdenc 567 */ 568 569 _CITRUS_STDENC_DECLS(VIQR); 570 _CITRUS_STDENC_DEF_OPS(VIQR); 571 572 #include "citrus_stdenc_template.h" 573
Indexes created Mon Oct 20 20:10:13 GMT 2025